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2005 California Desert Exotic Mustard Roadside Survey

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Results of a 70 mph windshield survey (or whatever the local speed limits were), of three exotic Mustards: Either not present; is present along roadsides or in medians; or is outside of the roadside to the fence line or has moved from the roadsides to infest adjacent land.

NS = None Seen. None of the three exotic Mustards of concern were seen along roadside ditches; or if divided highway, also not seen in the roadside median, or in lands adjacent to the road.

RS = Road Sides were infested. MED = In divided highways, in medians.

DES = One or more Exotic Mustards have moved from the roadsides into the desert, agricultural areas, or other lands adjacent to the roadsides. FL = Only found along the highway cyclone-fence line, but is far enough off the roadside to pose an immediate problem for the lands adjacent to the fences. At the time of the survey, did not appear to be moving off the fence line yet.

SPECIES PRESENT:

BT = Brassica tournefortii = Sahara Mustard
SL = Sisymbrium irio = London Rocket
SO = Sisymbrium orientale = Indian Hedge Mustard

PM = Post miles along highways, and numbers indicate the averages found not just at each post mile, but for 1/2 mile on either side of the post mile marker.

(Landmarks and other notes on other exotics or native plants will be in parentheses)

Survey April 2, 2005, may be updated periodically.

(PM markers, starts at Junction of Cal Hwy. 247)

73 - RS - BT
74 - I-15 and I-40 split
75 - BARSTOW, East Main Street
75.5 - DES - BT solid
76 - RS - BT common
77 - RS - BT thick in spots
78 - RS - BT thick in spots
79 - DES - BT scattered
Ft. Irwin exit
80 - DES & MED - BT
81 - DES & MED - BT
82 - DES & MED - BT
83 - DES & MED - BT
84 - DES & MED - BT
Yermo exit
85 - RS & MED - BT
86 - RS & MED - BT
87 - RS & MED - BT
California Ag. Inspection Station, westbound
88 - RS & MED - BT
Minneola Road
89 - RS & MED - BT thick
90 - RS & MED - BT thick
91 - RS & MED - BT thick
92 - RS & MED - BT thick
93 - RS & MED - BT thick
94 - RS & MED - BT thick
95 - RS & MED - BT scattered
Harvard road
96 - RS & MED - BT scattered
97 - RS & MED - BT scattered
98 - RS & MED - BT scattered
99 - RS & MED - BT thin
100 - RS & MED - BT thin
101 - RS & MED - BT thin
102 - RS & MED - BT thick
103 - DES & MED - BT
Field Road
104 - DES & MED - BT
105 - DES & MED - BT
106 - DES & MED - BT
107 - DES & MED - BT
108 - DES & MED - BT thick
Power line crosses
109 - DES & MED - BT thick
110 - DES & MED - BT scattered
111 - DES - BT; RS- SL starts
112 - DES & MED - BT
113 - DES & MED - BT thick
114 - DES & MED - BT thick
115 - DES & MED - BT thick
116 - DES & MED - BT thick
117 - DES & MED - BT thick
118 - DES & MED - BT thick
119 - DES & MED - BT thick
120 - DES & MED - BT thick
Basin Road
121 - DES & MED - BT thick
122 - DES & MED - BT scattered
123 - DES & MED - BT scattered
Rasor Road
124 - RS & MED - BT scattered
125 - RS & MED - BT scattered
126 - NS - The "Before Picture" of the desert ecosystem, before mustards.
127 - RS & MED - BT rare
128 - RS & MED - BT rare
129 - RS & MED - BT rare
130 - RS - BT rare (Zzyzy Road)
131 - RS - BT rare
132 - NS
133 - NS
134 - MED - BT rare
135 - MED - BT
136 - NP - Town of Baker
Mojave River bridge (PM 136.20)
137 - RS & MED - BT
138 - RS - BT scattered
139 - RS - BT scattered
140 - RS - BT scattered
141 - RS - BT scattered
142 - RS - BT scattered
143 - RS - BT scattered
144 - RS - BT scattered
145 - RS - BT scattered (2,000 ft. elevation)
146 - RS - BT scattered
147 - DES (rare) & RS - BT thick along roadsides -- example of move into desert
148 - RS - BT and SL thick
149 - RS - BT and SL thick
150 - RS - BT thick - Halloran Springs Road exit
151 - RS - BT and SL thick, solid in places
152 - RS - BT thick
153 - NS - SL scattered in ditch (Joshua trees)
154 - NS - SL scattered in ditch (Joshua tree forest - 4,000 ft. elevation)
155 - RS - SL scattered in ditch
156 - RS - SL scattered in ditch (Joshua trees)
157 - RS - SL scattered in ditch (Amsinckia)
158 - RS - SL scattered in ditch (Amsinckia solid)
159 - RS - SL scattered in ditch (Amsinckia)
160 - RS - SL scattered in ditch (Amsinckia)
Rest stop
161 - NS
162 - RS - SL at cloverleaf
Cima Road exit
163 - NS
164 - NS
165 - NS
166 - NS - (Indian Ricegrass)
167 - NS
168 - NS
169 - NS
170 - NS
171 - NS

Moutain Pass, Elevation 4,730 feet, Joshua tree forest, plus exotics red brome & cheatgrass.

172 - NS
173 - NS - (Desert Stipa common)
174 - NS - (Desert Stipa common)
Elevation 4,000 feet
175 - NS - (Mojave yuccas)
176 - NS
Nipton Road
177 - NS - (Mojave yuccas)
178 - NS
179 - DES - BT rare, within 50 feet of roadside
180 - RS - BT rare
181 - RS - BT rare to scattered at exit
182 - NS - Playa
183 - NS - Playa
184 - NS - Playa
185 - NS - Playa
186 - NS - Playa
186.50 - Nevada border

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